docs: def show_item_bottom_border(self, item_text, flag):
          """
          Sets a flag that will show a bottom border for an item with the specified text.
          :param item_text: the text property of the item
          :param flag: boolean specifying if the border should be shown.
          """
          if flag:
              self.__bottom_border_dict[item_text] = True
          else:
              self.__bottom_border_dict.pop(item_text, None)